Heel-trimming machine



(No Model.) 3 Sheets-Sheet 1.

A. LQF. MITCHELL.

HEEL TRIMMING MACHINE.

No. 363,410. Patented May 24, 188?.

N. PETERS Pholmutnngmphar. wnshnglen. 0.0,

(No Model.) 3 Sheets Shef.t=2.

A. L. F. MITCHELL.

Y HEEL TlivmwMIlmr MACHINE. No. 363,410. Patented LVIZay 4 187. f

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L I d /f @IWL N. PErEns, Pnueumugraphef, washington, D. a

3 Sheets-Sheet 3.

(No Model.)

A. Ll P. MITCHELL.

HEEL TRIMMING MACHINE.

No. 363,410. Patented May 24, l88..

W Illa 'cg f f N, FEYERS. PholwLiihographur, Walhinglun. DJ).

UNITED STATES PATENT rricn.

ALBION L. F. MITCHELL, OF LYNN, MASSACHUSETTS,

HEELTRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 363,410, dated May 24:, 1887.

Application filed June 3, 1886. Serial No. 203,998.

T 0 all whom, it may concern.-

Beit known that I, ALBION L. F. MITCH- ELL, of Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Heel-Trimming Machines, of which the following is a specification.

This invention has for its object to provide an improved machine for automatically trimming heels of boot-s or shoes 5 and it consists, as a whole, in the combination of a rotary cutter head, a j ack adapted to oscillate, and provided with heel-clamping devices, also adapted. to oscillate, a heel-pattern attached to the jack, so as to swing and oscillate with the heel to be trimmed, and a fixed rest, against which said pattern is pressed, the rest and pattern cooperating in governing the presentation of the heel to the cutter-head.

The invention also consists in certain details, all of which I will now proceed to describe.

Of the accompanying drawings, forming a part of this speciication, Figure 1 represents a front elevation of my improved machine. Fig. 2 represents an end elevation ofthe same. Figs. 2 and 2" represent, respectively, side and edge views of the bar and rack-segment whereby the heel-clamping devices are rocked or oscillated. Fig. 3 represents a top view of the machine. Fig. 4. represents a section on line x fr, Fig. 3. Fig. 5 represents a section on line y y, Fig. 8. Fig. 6 represents a, section on line z z, Fig. 1, looking downwardly.l Fig. 7 represents a view of a part of the opposite side of the machine from that shown in Fig. l.

The same letters of reference indicate the same parts in all the figures.

a represents the standard which supports the arbor b" of a rotary cutter-head, b, formed to trim a boot or shoe heel, as hereinafter described. To the standard a is rigidly attached a stout arm, c, and to the onter end of vthis arm is connected, by a pivot-bolt, d, a yoke or bearing, e, adapted to oscillate freely onV the pivot d. An arbor, f, is journaled in the yoke or bearing e, and on said arbor is mounted the supporting-frame g of the jack, said frame having bearings h l1., through which the arbor passes. The frame can therefore oscillate in two directions-viz., with the yoke e and arbor (No model.)

f on the pivot d, and independently of said yoke on the arbor f at right' angles to the direction in which it is capable of oscillating on said pivot.

The boot or shoe holdingportion of the jack is a rocking arbor, i2, jonrnaled in a bearing, g3, in the upper portion of the frame g and having an offset or bent portion, i, and a sleeve or a tubular extension, i, in line with the arbor t2. The arbor i2 is tubular, and in it is inserted a rod, z', having at one end a pivoted foot, t, which bears on the top of the heel portion of the last holding the boot or shoe. A nut, 2"", having a hand-Wheel, i, is engaged with a fiangcd collar on the pinion It', as shown in Fig. 4, and engages with athreaded portion of the rod z', said rod being made ad instable lengthwise in the arbor 'i2 by said nut, so that it can be adjusted to different sizes of lasts. The sleeve fr has a rod, il, which has a plate, is, at its inner end adapted to bear on the tread-surface of the heel, and is normally pressed against the latter by a spring, i, in said sleeve. A lever, im, pivoted to the offset 3 and engaged with the rod il, as shown in Fig. 4, enables the operator to throw the rod il back to release theheel. The rocking arbor and clamping devices above described are rocked with the boot or shoe by means of a pinion, h', rigidly attached to the arbor i2, and a rack-segment, i', on the upper end ofthe lever j', which is oscillated by an eccentric wrist-pin, m', on a disk on the arbor f, said pin entering a slot in the lower end of the leverj.

The described heel-clamping devices are so located with reference to the cutter-head b that the heel may be presented to said cutter-head. The oscillations of the frame g on the arbor f enable the heel to move toward and from the cutter, and enable the frame g to move as required when the heel is rotating and is in con. tact with the wheel. The oscillations of the frame g and the yoke or bearing e on the pivot d enable the heel to be moved across the perimeter of the cutter, so that all portions of the heel edge may be presented thereto.

P represents a heelshaped pattern affixed to the offset i of the rocking arbor near the tread-surface of the heel and surrounding the rod il. Said pattern has the exact form which is to be imparted to the heel.

R represents a rest for said pattern attached to the frame a and bearing against the molded surface of the pattern, so that the presentation of the heel to the cutter is determined by the pattern and rest, the latter governingA the approach of the heel toward the cutter, caused by the oscillations of the frame g on the arborf, and causing the frame g to move in a curved path corresponding to the curvature to be given to the heel from bottom to top. The rest B is adjustable, so that it may project more or less from the frame a, according to the size of the heel-pattern, andy is provided with a threaded shank, B', Fig. 5, which is engaged by a nut, B2, which is free to rotate on said shank, but is confined between two parts of a U-shaped bracket, B3. By rotat-ing said nut the rest R may be moved in or out, as will be readily seen.

The pattern is attached by a screw to an arm, Z2, which is secured by a screw, Z3, to a plate, Zt. Said plate is secured by a screw, Z5, to the offset portion 'Z3 of the rocking arbor, and may be turned on the screw Z5 when the latter is loosened. The screw Z3 is located at one side of the screw Z5, so that when the plate Z* is turned the position of the arm Z2 will be varied, so that said arm and the heel-pattern thereon may be inclined .either toward the right or toward the left, as may be required to cause it to conform to heels on right or left boots. The arm Z2 has a slot through which the screw Z3 passes, said slot being necessary to permit the described turning ofthe plate Zi to vary the inclination of the pattern,

The frame g is connected to the standard by a sliding telescopic connectionviz., a socket, w, pivotally connected to a sleeve, w3, which is tted to slide on a curved guide-rod, a, rigidly attached to the standard a, and a rod, a', secured to the frame g and sliding into and out of the socket w. A spring, j', secured at one end to the frame g and at the other end to.

a fixed support, pulls the frame toward the cutter-head.

I have provided means whereby the frame g is moved automatically in the direction required to first present the lower or top-lift edge of the heel to the cutter and cause the cutting action to progress gradually to the heel-seat portion, and is then released, so that the operator can swing i-t in the opposite direction tothe starting-point. Said means consist of an arbor, A, journaled in the frame g, and having at one end a disk, B, and at the other @nda mutilated wormwheel, C, a connectingrod, D, eceentrically pivoted at one end to a wrist-pin on the disk B, and pivoted at the other end to the socketw, an arbor, E, journaled in bearings on the frame g, and arranged at. right angles. to the arbor A, and a worm, F, on said arbor, meshing with the worm- 'Ihe rotation thus imparted to the arbor E is .communicated by the worm F and worm-wheel toward or from the center of the disk B, a slot,

being provided in the disk, in which the wristpin is adjustable. When the toothless portion of the wheel C reaches the worm F, the lastdescribed movement of the frame ceases, and the frame remains at rest until moved to its starting position by the operator.

The rapidity of t-her'dcscribed swinging movements ofthe frame may be varied by means of the different-sized pulleys H-and I.

I prefer to make the rod j', having the racksegment i', in two parts, 2 3, pivotally connected at 4. (See Figs. 2and 2b). 'Ihe part 2 has the rack-segment t', and also has two ears, in which is journaled a worm, 5, meshing with teeth 6 formed on the upper end of the part 3. By rotating said worm the part 2 may be turned so as to move the rack-segmentlongitudinally in either direction. I am thus enabled to regulate the limits of the oscillating movements imparted to the jack by the rod j and its racksegment.

It will be observed that the jack shown and Y described in this application is similar in certain respects to that shown in Letters Patent of the United States, granted to me February 17, 1885, No. 812,573, I do not therefore here claim anything shown in said patent.

1. 'Ihe combination, with the rotary cutterhead, of the jack pivoted to swing universally, as described, and provided with oscillatory heel-clamping devices, automatic mechanism, substantially as described, whereby said clamping devices may be oscillated while the heel held thereby is being presented" to the cutter head, mechanism, substantiallyas described, whereby the jack is automatically moved to cause the heel to move progressively across the cutter-head, a heelpattern affixed to the ICO IIO

jack, whereby the direction of the progressive i movement of the jack is determined, and a rest for said pattern, as set forth. c

2. The combination of a supporting-stand ard, a rotary cutter-head mounted thereon, a 'frame pivoted to said standard to swing universally, heel-clamping devices, substantially -as described, mounted in the swinging end of said frame, a heel-pattern affixed to said frame, mechanism whereby said heel-clamping devices are oscillated, mechanism whereby the frame is moved automatically in one direction to cause' the heel to move progressively across the cutter-head, and then released4 to permit its movement by the operator in the opposite direction, and a rest for the heel-pattern, all arranged and operating substantially as set forth.

3. The combination of a supporting-standard, a rotary cutter-head mounted thereon, a frame, g, pivoted to said standard to swing universally, heel-clamping devices, substantially as described, mounted in the swinging end of said frame, a heel-pattern also mounted on the swinging end of the frame, mechanism, substantially as described, whereby said heelclainping devices'and pattern are oscillated, the rest R for said pattern, the socket w, mounted to slide on a guide on the supportingstandard, the rotating arbor A, journaled in the frame g, and the connecting-rod D, connected to the socket w and to a disk on the arn bor A, as set forth.

4. The combination of the swinging and roekingjaek, the heel-pattern affixed to the jack, means, substantially as described, for swinging the jack, the rotary cutter, the ad- 20 justable rest, and means, substantially as de tally as described, for rigidly connecting the L section 2 to the section 3 in different positions, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 29th day of May, 1886.

ALBION L. F. MITCHELL.

Witnesses:

C. F. BROWN, A. D. HARRISON. 

